Sheathing for tires.



J. MARTI.

SIIBATHING FOB TIRES. AIPLIOATION FILED APIE. Z7, `1907.

Patetd-pr. 13, 190.9.

JOSE MARTI, OF MILAN, ITALY.

SHEATHING FOR TIRES.

Specicationof Letters Patent.

Patented April 1s, 190e.

Application led April 27, 1907. Serial No. 370,614.

- ol' the King ol' italy, residing; at Milan, Italy,

have invented certain new and uselul lmrovements in Sheathing lor Tires; and l do ereby declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same'.

My invention relates to a. sheathing for tires for automobile wheels, the wheels of cycles, and all sorts of vehicles, made of imperforable material, as will be hereinafter described.

-'Tli.e` sheathing referred to, besides the advantage'of imperl'orability and an elasticity, similar to those actually in use, has the additional advantage of reducing to the minimum possible the necessary quantity ofrubber, gum, .or other substances, serving the sameend, with a considerable economic advantage.

The sheathings referred to are constructed.

by superposing as many layers foll very strong cotton cloth, or other tissue, sufficient to obtain a total resistance corresponding to the strain to 'which the tires will be subjected in relationto' the Weight and the motive power of the vehicle i'or which they are intended. yThe various layers are prepared of ditl'erent dimensions and very carefully. arebroader than would be'necessary for the width ol' the tire, and the remaining layers diminish gradually in width so as to secure, as lar as possible, the'desired form to the tire sheathing, so that the thickness and resistan ce may be as great as possible in the central part or tread, which wears against the roadway, and may gradually decrease toward the edges. The layers ol' cloth in the parts, destined to forni the body ol' the tire sheathing,- aresewed crosswise and in close seams, except in the tread, preferably by suitable machines, with a thread oi' cotton, or other suitable textile material, in order to obtain a solid union,and at the same time secure the initial curvature.

aThe stuii' of which different layers are to be made, should be soaked in a bath and after- Ward carefully Washed in order to remove all finishing material', and to shrink saine fully.

Then the layers of Stull should be sewed in the manner above described, and should then A certain number of the outer layersA .l be immersed for a suitable time in boiling water, and then rapidly dried by a current of hot air, so that the shrinkage of the thread, which has sewed the layers together, will assist in rendering' mene solid and compurt the union ol" the layers themselves. It might high temperature be continued only long,r enougl'i to completely dry the outer faces ol the material, leaving the rest to dry slowly at normal temperatures. After this last process, the sheathing prepared as here-inbefore tion to the wheels o? the vehicle to which the tire is intended, and finit is accomplished by means ofl suitable mol-ds. ".Ir'hen the tire sheathingr l as been shaped tho interior face is covered with a canning ol" rubber, or varnish, or other substamrw art to render it impermeable, and to gire uf smooth and even wear surface to be. ox Anlsed to. the air tube. Where a sl'reathing Vwith a lungh surface bearingl ajrainsl'. this tubo is used, the Tough surface et' the she thing*Y is aller g time imprintedon the yieldins`- tubo. mai il weakening the latter. it 'the he slwatriiiur thus manufactured is to be made anti-slipping,,besides a thin layer on the exterior ot rubber, there should be an outer layer on the treadof cl'uome' leatluer with nuilsu'iveted therein, and joined cement suitable for this purpose. lf, on the contrary, the tire is to be used for racing` automobiles, where., more than anything else, it is ne., sary to obtain `great speed, it will sull-ice to apply, besides a very thin exterior layer ol rubber, a thin and special layer of leather', in; n protection to the tread. If, however, it is desired to have the tire appear exteriorly, like those in common use, 1n this case, instead of havingr on the exterior face a single thin layer ot' rubber, there should be several layers. leather and rubber are easily renewed at slight expense. 'l`he sheathiug is applied to the tire in the usual way.

The invention is illustrated 'by the accompanying' drawing, which shows a section through the rim ol the wheel with the tire mounted thereon. 4

A represeilns the rim ot' the wheel, in which the outer tube B 'is mounted. in the usual wav,inclcisin r the air tube C. i D represents the layers of cloth sewed tol gether, as herein'belore described..

described, is given the desired 'form in relato the tire sheath itself by a' All these additions ot'.

be desirable that the dr yingr oi the stuit at a v having t e rivets f.

y varied at Will.

R then Washing and shrinking all the layers,

.- ing thesaine in a current of hot air andyiinally molding the said layers into shape substan- J plurality of outer'layers of cotton clot and also suitably shaping a layers of cotton lothvvhic E represents the exterior rubber casing, and F re resents the armor of chrome leather It will be obvious that the relative thickness of the cloth, rubber, and leather may be Having thus described my invention, What I claimv 'and desire to secure by Letters Patent of the United States,4 is Y l. The process 'of making a sheathing for tires, which1 consists in suitably shaping a plurality of outer layers of cloth7 broader than is necessary for the Width of the tireytt and suitably shaping,v a

dplurality of inner layers Which gradually iminish in width,

then sewingl the saine together, then soaking the same in hot Water and then rapidly drytiallyas described.

2. VThe process of making a sheathing .for tires, which consists in -suitably sha ing a lurality of inner gradually diminish-in Width, then Washing and shrinking the same, then sewing the said layers in close seams, 'then soaking the same'in hot Water then drying in a current kof hotair, Athen molding the same into suitable shape and iinally covering the exteriorwith a layer of rubber substantially as described. v l

3.' The process 'of making a sheathing for tires, Whichconsists in suitably sha ing al plurality of outer layers of cotton clot and also suitably shaping'- a layers of cotton cloth Whic graduali diminish vin Width, then Washing and shrining the same, then sewing the said layers in close seams,- lthen soaking the saine in hot Water,

OzvALno BELLAVITA, -M. DIENDoRr-nn, Jr.

lurality of inner'y 

